The AstronomersProposalTool is a JavaLanguage application which allows astronomers to consider the scientific feasability of a particular set of observations and/or to plan how those observations are executed. The tool is currently designed to work on the HubbleSpaceTelescope, but could be adapted to work on other telescopes or even multiple telescopes. For more information, please consult the project Web page at http://ra.stsci.edu/apst/apt/. ---- CategoryScience